Switch to indentation with 2 spaces
whitespace

reindent after switching to 2-space indentation
Have image_type return NA_character_ on failure

* Because switch will fall through to default for NA_character_ but not NA
Fix: Give appropriate error when trying to read unimplemented filetype
git: don't ignore man or NAMESPACE

* need these for install_github even if they are not really source files
Add NAMESPACE and docs files

* need these for install_github even if they are not really source files
news and description for v0.1-1